[Intel-gfx] [PATCH v3] drm/i915: set minimum CD clock to twice the BCLK.

Abhay Kumar abhay.kumar at intel.com
Tue Apr 17 19:06:14 UTC 2018


In glk when device boots with only 1366x768 panel, HDA codec doesn't comeup.
This result in no audio forever as cdclk is < 96Mhz.
This change will ensure CD clock to be twice of  BCLK.

v2:
    - Address comment (Jani)
    - New design approach
v3: - Typo fix on top of v1

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102937
Signed-off-by: Abhay Kumar <abhay.kumar at intel.com>
---
 drivers/gpu/drm/i915/intel_cdclk.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_cdclk.c b/drivers/gpu/drm/i915/intel_cdclk.c
index dc7db8a2caf8..6e93af4a46ea 100644
--- a/drivers/gpu/drm/i915/intel_cdclk.c
+++ b/drivers/gpu/drm/i915/intel_cdclk.c
@@ -2143,7 +2143,7 @@ int intel_crtc_compute_min_cdclk(const struct intel_crtc_state *crtc_state)
 	/* According to BSpec, "The CD clock frequency must be at least twice
 	 * the frequency of the Azalia BCLK." and BCLK is 96 MHz by default.
 	 */
-	if (crtc_state->has_audio && INTEL_GEN(dev_priv) >= 9)
+	if (INTEL_GEN(dev_priv) >= 9)
 		min_cdclk = max(2 * 96000, min_cdclk);
 
 	/*
-- 
2.7.4



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